I think there under powered also,Listen to how the engine RPM drops! She even reaches down to adjust the throttle as if its not wide open,A bagger would make it bog even more.http://www.youtube.com/watch?v=kacaH...yer_detailpage
These will be offered with Kawasaki engines somtime soon, Im going to hold off just to see what will be available for these.

Do you think cutting that low maybe getting some soil in the mix, might have made it bog like that?
My dealer has sold many z700 with no complaints.
we cut at 4'' to 5'' here

I would say it is. Also thats not dust she's blowing up its water. The grass is really wet in this vid. She's also blowing everything to the inside and mowing back over it. Other than that she's doing a great job.

With an opening like this, it looks like it can move the grass easily..

Yep! I measured it at my local dealer.The opening is 13.5 inches which is the same size as the new gravely Xfactor 2.I demoed A pro turn 452 and all I can say is it mowed beautiful in thick north Carolina fescue.The Kubota is the only one I haven't demoed yet.They feel really comfortable looking forward to testing one soon.